Secret State. Channel 4: 10.00pm

Tis the final part of the political thriller starring Gabriel Byrne, Douglas Hodge, Gina McKee, Charles Dance, Rupert Graves and Ruth Negga. Following the attack on Anthony Fossett, Agnes (Negga) tries every avenue to contact Tom Dawkins (Byrne) and share information about what brought down the Prime Minister's plane. When MI6 brief Dawkins about the cause of the crash, he takes drastic steps to stick to his principles as the true intentions of those around him become clear.